Content Type OA ? PCA ? Books (Back List, Front List) No Yes Request a holdings comparison Portico provides a free holdings comparison service to compare a library’s journal or book holdings to the Portico archive. Search titles and ISSNs by keyword: Show: E-Books All0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ Titles start with V (1) Information Validez de normas y de actos jurídicos: Estudios de Teoría General desde el derecho privado Author/Editor: JESÚS DELGADO ECHEVERRÍA ,Manuel Atienza